Alright, let's work through 21537387 times 82742744 step by step
21537387 × 82742744 = 82742744 × (21537387)
+ 82742744 × 7 that is equal 579199208
+ 82742744 × 80 yielding 6619419520
+ 82742744 × 300 yielding 24822823200
+ 82742744 × 7000 giving us 579199208000
+ 82742744 × 30000 that results in 2482282320000
+ 82742744 × 500000 that equals 41371372000000
+ 82742744 × 1000000 which equals 82742744000000
+ 82742744 × 20000000 that equals 1654854880000000

= 1782062498969928
